That’s got nothing to do with the lack of using cursive. That’s got to do with the use of spell checkers and texting. As life gets more convenient and self correcting certain skills evaporate. Most of the population can’t drive a stick either.
The heck it doesn't. It is just one of those "evaporative skills" that you cite. I call it the dumbing down of our society. Don't get me wrong, it didn't just start at the electronic age. Read letters and papers from your ancestors. The style was much more flowing, and intelligent. Needless to say the actual vocabulary of those who were literate then, had to be twice as much as people today.
Face it our language has gone ghetto.